NIPPON HOSO KYOKAI
382Patents
103Active
382Granted
60Portfolio score
Filing activity: Aug 27, 1973 → Jan 23, 2024 · 23 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7250226B2 | Phosphorescent compound, a phosphorescent composition and an organic light-emitting device | Emerging Cross-Sectional Technologies | 819 | Expired |
| US5406551A | Method and apparatus for digital signal transmission using orthogonal frequency division multiplexing | Electricity | 241 | Expired |
| US5315377A | Three-dimensional image display using electrically generated parallax barrier stripes | Electricity | 143 | Expired |
| US3936595A | Signal transmission system for transmitting programed information such as programed instruction | Electricity | 134 | Expired |
| US4363963A | Solid state photo-electric converting device and solid state imaging apparatus employing it | Electricity | 133 | Expired |
| US3988528A | Signal transmission system for transmitting a plurality of information signals through a plurality of transmission channels | Electricity | 128 | Expired |
| US6512759B1 | Transmitter and receiver | Electricity | 127 | Expired |
| US4244006A | Control device for television camera | Electricity | 110 | Expired |
| US6788654B1 | Digital data receiver | Electricity | 99 | Expired |
| US5596582A | AFC in OFDM modulation by shift of a window along a reception sample sequence | Electricity | 87 | Expired |
| US4710817A | Solid state image sensor | Electricity | 77 | Expired |
| US5012351A | Stereoscopic video disc record and recording and reproducing apparatus therefor | Electricity | 77 | Expired |
| US5703637A | Retina direct display device and television receiver using the same | Electricity | 75 | Expired |
| US7825582B2 | Flexible display and manufacturing method thereof | Emerging Cross-Sectional Technologies | 69 | Active |
| US5260815A | Light writing type projection display using polymer-dispersed liquid crystal and liquid crystal television set as image light source | Electricity | 64 | Expired |
| US5058184A | Hierachical information processing system | Physics | 62 | Expired |
| US4307420A | Motion-compensated interframe coding system | Physics | 62 | Expired |
| US4551753A | Picture signal processing system including spatio-temporal filter | Electricity | 59 | Expired |
| US5132793A | Television receiver compatible with both standard system television signal and high definition television signal | Electricity | 57 | Expired |
| US4807954A | Optical coupling device | Physics | 55 | Expired |
| US4692801A | Bandwidth compressed transmission system | Electricity | 54 | Expired |
| US5063445A | Multiple sub-sampling transmitting/receiving system performing interfield and interframe offset sub-sampling of a broad bandwidth television signal | Electricity | 53 | Expired |
| US5305420A | Method and apparatus for hearing assistance with speech speed control function | Electricity | 49 | Expired |
| US4839729A | Solid state image sensor | Electricity | 49 | Expired |
| US4692662A | High contrast display device | Electricity | 46 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.